Grain drying layer flow and heating quantity control method of grain dryer

Abstract

The invention discloses a grain drying layer flow and heating quantity control method of a grain dryer. The control method comprises the following steps: (1) a grain drying ratio k is calculated; (2) the grain dryer is opened; and the output of an air heater is adjusted to reach maximum heat M; (3) a grain flow X in a grain drying layer is detected; (4) corresponding to the grain flow X in the step (3), heat Y of the air heater needed for drying of the grain flow X is calculated according to Y=kX; and (5) Y calculated in the step (4) is compared with the maximum heat M of the air heater. The control method cannot influence the grain drying speed to save the time; and through adjustment of the grain flow X, the maximum value of the grain drying quantity under the condition of the maximum needed heat value M can be rightly reached, so that the output waste of the air heater cannot be caused, the grain water nonuniformity during drying cannot be caused, and the drying efficiency and the drying quality of the grain dryer on the market are greatly improved.

Description

technical field [0001] The invention relates to the technical field of grain drying, in particular to a method for controlling the grain drying layer flow rate and heat supply of a grain drying machine. Background technique [0002] When the grain dryer is working, the motor drives the impeller of the axial flow fan to rotate at a high speed, so that the hot air generated by the combustion of the coal furnace is sucked into the fan through the upper part of the wind screen (forming a hot air fan), and mixed with the cold air sucked into the fan from the lower part of the wind screen. The gas enters the stacking rack through the windshield pipe and then diffuses (the function of the hot air reflector is to make the mixed gas diffuse more evenly). The water vapor gradually dries the millet. [0003] In the prior art, the hot air blower is generally turned on, and then a certain flow of grain is passed in for drying, but it has the following obvious defects: 1. When the heat o...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the hot air blower is generally turned on, and then a certain flow of grain is passed in for drying, but it has the following obvious defects: 1. When the heat output of the hot air blower is adjusted to the maximum, if the input grain flow is relatively If it is small, it will reduce the efficiency of the hot air blower and cause waste; if the flow rate of the input grain is too large, some grains will not be able to be dried, affecting the drying quality and causing losses; 2. When the output heat of the hot air blower is too low, it will affect Grain drying speed, wastes a lot of time

Images